How far down inside the Hornady case does the inside ID stay the same. For instance, after firing, it would be .452 for what depth? Same for the the 284 case.
My reason for asking has to do with cast bullets and their length and my thought here applies only to cast bullets. I have a 45-90 Black Powder Cartridge Rifle (Ballard Pacific No. 5 -- that is for sale by the way), that I had accuracy issues with my loads. Recovered slugs revealed gas cutting on the bases. I used an over powder wad and it baffled me why that would be happening. The dies I had been using were Redding (really nice dies), but on fired brass they put a slight shoulder or sized only the first 1/2 inch (est) of the case. As a result, only 1/2 inch (est) of the bullet was actually gripped by the case walls. The remainder of the bullet was unsupported, upon firing, the gases went around the unsupported portion of the bullet and the case wall -- damaging the back of the bullet. It wasn't unit that got another set of dies from Lyman that this phnenomon stopped happening and accuracy improved to the minnute or minute and a half realm.
This is the reason I am asking about the dimensions. Could this be happening to the cast bullets in the 450 case. Are the lead bullets fully supported by the case wall for their entire length. If not, that may explain some of the accuracy issues. I have read on 458S posts of horrible accuracy with lead bullets -- even with gas checks. In that case design, a major portion of the bullet is not supported by the case.
Maybe with the 284 cases and the proper reamers, we can alter the case to be more cast bullet friendly.